Answers

Not an evergreen...but a brilliant climber for an arch producing interest from June till November is the clematis "Bill Mackenzie"..it has a profusion of yellow flowers followed by lovely seed heads, and it is very rampant. One of my gems!

There is some pretty Climbing Roses out there as well .
Ive just emailed Cants Of Colchester about 2 of their Climbing Roses.
They were such a lovely colour they were about £8 each , but i know it sounds expensive but they are good quality Roses

Thanks for all your advice guys - just waiting on Argos to deliver the arch so we can go and select the climbers. Like the sound of the evergreen clematis and the jasmine. We've already got the Tangutica but I didn't know it as Bill Mackenzie.